Suction pump means having trans-



March 31, 1964 G. s. MITTELSTAEDT 3,127,091

SUCTION PUMP MEANS HAVING TRANSVERSELY DIVIDED SUCTION TUBES Filed Feb.26, 1962 --3 FIG.I l6

United States Patent f'ce 3,127,091 SUCTION PUMP MEANS HAVING TRANS-VERSELY DIVIDED SUCTION TUBES Georg S. Mittelstaedt, 27 4 73rd St.,Brooklyn, N.Y. Filed Feb. 26, 1962, Ser. No. 175,595 9 Claims. (Cl.230-92) This invention relates to suction means, including suctionpumps, and relates particularly to the specific construction of thesuction device, that is, the conduit or flow tube and the suction tubeassociated therewith. The device is capable of independent use, separateand apart from any specific use or any specific source of fluid throughthe conduit, and may be used wherever suction devices are employed. Forinstance, the suction device may be used in connection with jet enginesand other internal combustion devices, it may be used in combinationwith any intake or exhaust means, with spray, draining, and draftdevices, with aeration devices and other combining devices, to driveturbines or other apparatus, and wherever suction flow is utilized.

Objects of this invention are: to provide a suction pump in connectionwith fluid flow, to increase the efliciency of suction devices, toimprove suction tubes, to improve suction pumps, to produce suctionflow, to augment suction flow, to augment flow in the conduit downstreamof the suction pump, to increase the effective total momentum of fluid,to increase the effective total momentum of fluid discharged in unittime, to increase thrust, to increase power, to utilize the suction flowto secure a cooling effect, to drive a turbine, to provide a coolrunning turbine, simplicity of construction, installation, andmaintenance, and low cost.

These and other objects will become apparent in the description below,in which characters of reference refer to like-named parts in thedrawing.

The drawing shows sectional views illustrating the invention, but theinvention is not limited to the particular examples illustrated.

FIGURE 1 is a longitudinal sectional view of a conduit and atransversely partitioned suction tube extending across the conduit,showing an embodiment of this invention.

FIGURE 2 is similar to FIGURE 1, but the transverse partition extendsbeyond the peripheral line of the suction tube.

FIGURE 3 is a transverse sectional View of the device taken on the line3-3 of FIGURE 1.

FIGURE 4 is a transverse sectional view taken on the line 4-4 of FIGURE2.

Referring in detail to the drawing, the numeral indicates a conduit orflow tube, and 11 indicates a suction tube extending across the flowtube at right angles to the axis thereof. The suction tube is open atboth ends and has a peripheral or perimetric opening 13. The unmeral 12indicates welds or other fastening means, and the arrows in the tubesindicate the direction of flow. The flow tube and suction tube are thestraight line wall type. The suction tube diverges and then convergestransversally, and a constriction of flow is produced which increases tothe diameter of the suction tube, and then decreases. Velocity increasesand decreases in proportion to constriction of flow. The suction opening13 preferably begins immediately downstream of the greatest constrictionof flow and extends toward the rear portion of the suction tube. Apartition 14 is provided across the structure of the suction tube on alevel with the suction opening 13, so as to form two channels 16 and 17leading to opposite ends of the suction tube. Since pressure is reducedaccompanying increase of velocity, 21 low pressure area is produced, andair or other fluid is drawn through both ends of the suction tube intothe flow tube.

3,127,091 Patented Mar. 31, 1964 The broken line 15 indicates anextension of the partition 14, extending rearward to the peripheral lineof the suction tube, thereby increasing the suction effect.

FIGURE 3 is a transverse view of the described device, taken on the line3-3 of FIGURE 1.

In FIGURE 2, the broken line 20 indicates the extension of thetransverse partition beyond the peripheral line of the suction tube.This reduces turbulence at the suction opening and further increases thesuction effect. This extension 20 may also spread sideways toward or tothe wall of the flow tube, as indicated in FIGURE 4.

FIGURE 4 is a transverse view of the device, taken on the line 44 ofFIGURE 2.

It must be noted that tubes of any kind may be run from the describedsuction openings to opposite ends of the suction tube.

The suction opening 13 may be formed by cutting away or otherwiseeliminating all or part of the wall of the suction tube downstream ofthe greatest constriction of flow. The suction tube may also be cast orotherwise made with corresponding openings. The openings may be of anycharacter, shape, or form, and in the text and claims, by openmg is alsomeant plural openings, including slits, perforations, pores, or anyother type opening. The wall portion of the suction tube toward the howmay be streamlined, or be equipped with a fairing, and this is part ofthis invention.

The suction tube may be fastened to the conduit by any suitable meanssuch as welding, soldering, bolting, cementing, screwing etc; or afitting may be made comprising a representative portion of the conduitand the described suction tube extending thereinto, the fitting beinginserted in the conduit or attached thereto by any suit able means. Suchmeans include unions or other coupling means, cementing, soldering,welding etc. The broken lines 18 and 19 in FIGURE 1 indicate theinsertion of the fitting in the conduit.

Examples of practical applications of the invention are: (l) drainagepumps, where the defined suction tube communicates with useless water;(2) aeration devices, where the defined suction tube communicates withair or other gas; (3) mixing devices, where the defined suction tubetube communicates with selective mixing fluid; (4) spray devices, wherethe suction means and a suitable nozzle are disposed at the end of thehose or conduit, and where the defined suction tube communicates withfluid material used in the spray; (5) exhaust pumps for piston typecombustion engines, Where the device is inserted in the exhaust line orattached to the end of the tail pipe, and Where the defined suction tubecommunicates with air; (6) suction pumps for jet engines, where thedefined suction tube may extend (:1) across the air intake duct, (b)across the burner or ducted burner, preferably at a point where highvelocity has been reached, (0) across the exhaust tube of a combustionchamber, (d) across the exhaust nozzle. Here the objects are to increaseflow, to increase the effective total momentum of fluid discharged inunit time, to increase power, and to increase thrust. (7) Suction pumpaccording to Example 6, where the suction tube is connected with turbinemeans, the turbine means to compressor means, and where a duct isprovided conveying the compressed air to the combustion chamber. Fuelmeans and perhaps ignition means may be provided in an optional manner.

I illustrate a conduit and suction tube of the straight line wall type,and I show the suction tube extending into the conduit at right anglesto the axis thereof; but any other suitable type conduit or suctiontube, and any other type of extension or angular inclination may beemployed.

Suction effect augmenters may be used in connection with the suctiontubes. The augmenters may comprise enlarged mouths at the outer end ofthe suction tubes.

In the text and claims, by tubes of the straight line wall type is meantthis type at the aspiration point; by tube is also meant duct, channel,passage; by suction tube is meant any tube which conveys suction flow,also in part; by conduit or flow tube is also meant channel, duct,passage, ducted burner, exhaust tube, exhaust nozzle; by fluid is meantany substance which is capable of flowing, as a liquid, a gas, orreadily movable solids; by upstream side or downstream side of thesuction tube is meant in relation to the flow through the flow tube.

The principles involved in this invention may be applied 5 to all fieldsof fluid flow, as related to suction.

Changes in form and construction may be made without departing from thespirit or scope of the invention.

I claim:

1. Suction pump means comprising a flow tube, an open-ended suction tubeextending across the flow tube, the ends of the suction tube extendingat least to the outside of the flow tube, said suction tube producing inthe flow tube an increasing-decreasing constriction of flow, an openingin the wall of the suction tubedownstream of the greatest constrictionof flow, and partition means dividing the suction tube transversely anddividing said opening so as to provide longitudinally arrangedperipheral openings in the suction tube, said partition means with thesuction tube forming channels in the suction tube leading from separateperipheral openings to opposite ends of the suction tube; saidconstriction of flow producing a low pressure area, resulting in fluidbeing drawn through the suction tube into the flow tube.

2. In suction pump means comprising a flow'tube, an open-ended suctiontube extending across the flow tube through the wall thereof so that theends of the suction tube open exteriorly of the flow tube, the suctiontube producing in the flow tube an increasing-decreasing constriction offlow, and an opening in the wall of the suction tube downstream of thegreatest constriction of flow, a partition dividing the suction tube andsaid opening transversely and extending to the perimeter of the suctiontube.

3. Suction pump means comprising a flow tube, an open-ended suction tubeextending across the flow tube through the wall thereof so that the endsof the suction tube open exteriorly of the flow tube, the suction tubeproducing in the flow tube an increasing-decreasing constriction offlow, an opening in the wall of the suction tube downstream of thegreatest constriction of flow, and a partition dividing the suction tubeand said opening transversely, said partition having an extensionprojecting beyond the perimeter of the suction tube.

4. Suction pump means comprising a flow tube, an open-ended suction tubeextending across the flow tube, the ends of the suction tube extendingat least to the outside of the flow tube, said suction tube producing inthe flow tube an increasing-decreasing constriction of flow,longitudinally arranged openings in the wall of the suction tubedownstream of the greatest constriction of flow, and means formingseparate channels in the suction tube leading from separate wallopenings to opposite ends of the suction tube; said constriction of flowproducing a low pressure area, resulting in fluid being drawn throughthe suction tube into the flow tube.

5. In suction pump means comprising a' flow tube and 4 an open-endedsuction tube extending across the flow tube, the ends of the suctiontube extending at least to the outside of the flow tube, and the suctiontube producing in the flow tube an increasing-decreasing constriction offlow, transversal partition means in the suction tube, and perimetricopenings in the suction tube on both sides of the transversal partitionmeans downstream of the greatest constriction of flow, said partitionmeans with the suction tube forming separate channels leading from saidseparate perimetric openings to separate ends of the suction tube; saidconstriction of flow producing a low pressure area, resulting in fluidbeing drawn through the suction tube into the flow tube.

6. In suction pump means comprising a flow tube, an open-ended suctiontube extending across the flow tube and through the wall thereof so thatthe ends of the suction tube open exteriorly of the flow tube, saidsuction tube producing in the flow tube an increasing-decreasingconstriction of flow, and transversal partition means disposed in thesuction tube, peripheral openings in the suction tube on both sides ofthe transversal partition means downstream of the greatest constrictionof flow, said partition means with the suction tube forming separatechannels connecting said separate peripheral openings with separate endsof the suction tube; said constriction of flow producing a low pressurearea, resulting in fluid being drawn through the suction tube into theflow tube.

7. In suction pump means comprising a flow tube and an open-endedsuction tube extending across the flow tube through the wall thereof sothat the ends of the suction tube open exteriorly of the flow tube,longitudinally arranged, separate peripheral openings in the suctiontube on the downstream side thereof, and a transverse partition in thesuction tube extending between the longitudinally arranged peripheralopenings, said partition with the suction tube forming separate channelsin the suction tube leading from said separate peripheral openings inthe suction tube to separate ends of the suction tube.

8. In suction pump means comprising a flow tube and an open-endedsuction tube extending across the flow tube through the wall thereof sothat the ends of the suction tube open exteriorly of the flow tube,longitudinally arranged, separate perimetric openings in the suctiontube on the downstream side thereof, and means forming separate channelsin the suction tube leading from said separate perimetric openings toopposite ends of the suction tube.

9. In suction pump means comprising a flow tube, an open-ended suctiontube extending across the flow tube through the wall thereof so that theends of the suction tube open exteriorly of the flow tube,longitudinally arranged peripheral openings in the suction tube on thedownstream side thereof, and means forming separate channels in thesuction tube connecting said separate peripheral openings with separateends of the suction tube, a flat body disposed between the peripheralopenings exteriorly of the suction tube and extending longitudinallyinto the flow tube.

References Cited in the file of this patent UNITED STATES PATENTS2,230,004 Morgan Jan. 28, 1941

1. SUCTION PUMP MEANS COMPRISING A FLOW TUBE, AN OPEN-ENDED SUCTION TUBEEXTENDING ACROSS THE FLOW TUBE, THE ENDS OF THE SUCTION TUBE EXTENDINGAT LEAST TO THE OUTSIDE OF THE FLOW TUBE, SAID SUCTION TUBE PRODUCING INTHE FLOW TUBE AN INCREASING-DECREASING CONSTRICTION OF FLOW, AN OPENINGIN THE WALL OF THE SUCTION TUBE DOWNSTREAM OF THE GREATEST CONSTRICTIONOF FLOW, AND PARTITION MEANS DIVIDING THE SUCTION TUBE TRANSVERSELY ANDDIVIDING SAID OPENING SO AS TO PROVIDE LONGITUDINALLY ARRANGEDPERIPHERAL OPENINGS IN THE SUCTION TUBE, SAID PARTITION MEANS WITH THESUCTION TUBE FORMING CHANNELS IN THE SUCTION TUBE LEADING FROM SEPARATEPERIPHERAL OPENINGS TO OPPOSITE ENDS OF THE SUCTION TUBE; SAIDCONSTRICTION OF FLOW PRODUCING A LOW PRESSURE AREA, RESULTING IN FLUIDBEING DRAWN THROUGH THE SUCTION TUBE INTO THE FLOW TUBE.